on high horse

Also found in: Dictionary, Thesaurus, Medical, Legal, Encyclopedia.

on (one's) high horse

Having an attitude of condescending moral superiority. My sister was a troublemaker as a teenager, yet she's always her high horse lecturing me about my life choices. The radio host is known for climbing on his high horse when talking to listeners and guests about the importance of family values, despite the fact that he's been divorced three times for cheating on his spouses.
See also: high, horse, on

on one's high horse

Fig. in a haughty manner or mood. Larry is on his high horse again, bossing people around. The boss is on her high horse about the cost of office supplies.
See also: high, horse, on